plotters: add signals to periodogram and spectrogram

Periodogram/Periodogram.cpp

@@ -230,6 +230,7 @@ class Periodogram : public Pothos::Topology
         this->connect(this, "clearChannels", _display, "clearChannels");
         this->connect(_display, "frequencySelected", this, "frequencySelected");
         this->connect(_display, "relativeFrequencySelected", this, "relativeFrequencySelected");
+        this->connect(_display, "levelSelected", this, "levelSelected");
 
         //connect to the internal snooper block
         this->connect(this, "setDisplayRate", _trigger, "setEventRate");

Periodogram/PeriodogramDisplay.cpp

@@ -58,6 +58,7 @@ PeriodogramDisplay::PeriodogramDisplay(void):
     this->registerSlot("clearChannels");
     this->registerSignal("frequencySelected");
     this->registerSignal("relativeFrequencySelected");
+    this->registerSignal("levelSelected");
     this->setupInput(0);
 
     //layout
@@ -230,6 +231,8 @@ void PeriodogramDisplay::handlePickerSelected(const QPointF &p)
     const double freq = p.x()*_sampleRate/_sampleRateWoAxisUnits;
     this->emitSignal("frequencySelected", freq);
     this->emitSignal("relativeFrequencySelected", freq - _centerFreq);
+    const double level = p.y();
+    this->emitSignal("levelSelected", level);
 }
 
 void PeriodogramDisplay::handleLegendChecked(const QVariant &itemInfo, bool on, int)

Spectrogram/Spectrogram.cpp

@@ -210,6 +210,8 @@ class Spectrogram : public Pothos::Topology
         this->connect(this, "setColorMap", _display, "setColorMap");
         this->connect(_display, "frequencySelected", this, "frequencySelected");
         this->connect(_display, "relativeFrequencySelected", this, "relativeFrequencySelected");
+        this->connect(_display, "timeSelected", this, "timeSelected");
+        this->connect(_display, "levelSelected", this, "levelSelected");
 
         //connect to the internal snooper block
         this->connect(_display, "updateRateChanged", _trigger, "setEventRate");

Spectrogram/SpectrogramDisplay.cpp

@@ -32,6 +32,7 @@ SpectrogramDisplay::SpectrogramDisplay(void):
     _centerFreqWoAxisUnits(0.0),
     _numBins(1024),
     _timeSpan(10.0),
+    _timeSpanWoAxisUnits(1.0),
     _refLevel(0.0),
     _dynRange(100.0),
     _fullScale(1.0),
@@ -68,6 +69,8 @@ SpectrogramDisplay::SpectrogramDisplay(void):
     this->registerCall(this, POTHOS_FCN_TUPLE(SpectrogramDisplay, setRateLabelId));
     this->registerSignal("frequencySelected");
     this->registerSignal("relativeFrequencySelected");
+    this->registerSignal("timeSelected");
+    this->registerSignal("levelSelected");
     this->registerSignal("updateRateChanged");
     this->setupInput(0);
 
@@ -180,22 +183,24 @@ void SpectrogramDisplay::setDynamicRange(const double dynRange)
 void SpectrogramDisplay::handleUpdateAxis(void)
 {
     QString timeAxisTitle("secs");
+    double timeFactor = 1.0;
     if (_timeSpan <= 100e-9)
     {
-        _timeSpan *= 1e9;
+        timeFactor = 1e9;
         timeAxisTitle = "nsecs";
     }
     else if (_timeSpan <= 100e-6)
     {
-        _timeSpan *= 1e6;
+        timeFactor = 1e6;
         timeAxisTitle = "usecs";
     }
     else if (_timeSpan <= 100e-3)
     {
-        _timeSpan *= 1e3;
+        timeFactor = 1e3;
         timeAxisTitle = "msecs";
     }
     _mainPlot->setAxisTitle(QwtPlot::yLeft, timeAxisTitle);
+    _timeSpanWoAxisUnits = _timeSpan*timeFactor;
 
     QString freqAxisTitle("Hz");
     double factor = std::max(_sampleRate, _centerFreq);
@@ -224,7 +229,7 @@ void SpectrogramDisplay::handleUpdateAxis(void)
     //update main plot axis
     const qreal freqLow = _fftModeComplex?(_centerFreqWoAxisUnits-_sampleRateWoAxisUnits/2):0.0;
     _mainPlot->setAxisScale(QwtPlot::xBottom, freqLow, _centerFreqWoAxisUnits+_sampleRateWoAxisUnits/2);
-    _mainPlot->setAxisScale(QwtPlot::yLeft, 0, _timeSpan);
+    _mainPlot->setAxisScale(QwtPlot::yLeft, 0, _timeSpanWoAxisUnits);
     _mainPlot->setAxisScale(QwtPlot::yRight, _refLevel-_dynRange, _refLevel);
 
     _mainPlot->updateAxes(); //update after axis changes before setting raster
@@ -268,6 +273,10 @@ void SpectrogramDisplay::handlePickerSelected(const QPointF &p)
     const double freq = p.x()*_sampleRate/_sampleRateWoAxisUnits;
     this->emitSignal("frequencySelected", freq);
     this->emitSignal("relativeFrequencySelected", freq - _centerFreq);
+    const double time = p.y()*_timeSpan/_timeSpanWoAxisUnits;
+    this->emitSignal("timeSelected", time);
+    const double level = _plotRaster->value(p.x(), p.y());
+    this->emitSignal("levelSelected", level);
 }
 
 void SpectrogramDisplay::appendBins(const std::valarray<float> &bins)

Spectrogram/SpectrogramDisplay.hpp

@@ -151,6 +151,7 @@ private slots:
     double _centerFreqWoAxisUnits;
     size_t _numBins;
     double _timeSpan;
+    double _timeSpanWoAxisUnits;
     double _refLevel;
     double _dynRange;
     double _fullScale;